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	Effects of soil spatial resolution on quantifying CH4 and N2O emissions from rice fields in the Tai Lake region of China by DNDC model
	Yu, D. S.1,3; Yang, H.1; Shi, X. Z.3; Warner, E. D.2; Zhang, L. M.3; Zhao, Q. G.1,3
刊名	GLOBAL BIOGEOCHEMICAL CYCLES
	2011-05-13
卷号	25页码:8
ISSN号	0886-6236
DOI	10.1029/2010GB003825
通讯作者	Yu, D. S.(dshyu@issas.ac.cn)
英文摘要	Fourteen grid data sets of different cell resolutions were generated, from 0.5 x 0.5 km to 64 x 64 km, to estimate CH4 and N2O emissions from paddy soils in the Tai Lake region of China using the Denitrification-Decomposition (DNDC) model. The grids were derived from a polygon-based data set (1: 50,000 digital soil map/database), which was the most detailed soil database for the region. Comparison of simulated CH4 and N2O concentrations from input of the 14 grid data sets with the original polygon data demonstrated (1) no distinct variability (relative errors < 5%) of the results when grid data sets of cell size <= 2 km were used as input for the DNDC model; (2) slight variability (< 10%) in the results when grid data sets with cell size in the range of 2 to 8 km were used as input; and (3) distinct variability (> 10%) in the results when grid data sets with cell size of > 8 km were applied as input. A grid data set with a cell size of 8 km was found to be optimal based on accuracy and computational efficiency of DNDC simulations. The results can be used as a guideline for optimizing field sampling strategies for locations where there is a lack of or insufficient soil data, whereby soil data can be collected through sampling in cell centers of designed grid frames.
收录类别	SCI
WOS关键词	GREENHOUSE-GAS EMISSIONS ; NITROUS-OXIDE EMISSIONS ; METHANE EMISSIONS ; ORGANIC-CARBON ; PRODUCTION SYSTEMS ; WATER MANAGEMENT ; RAINFALL EVENTS ; PADDIES ; AGRICULTURE ; SIMULATION
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000290621100001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558973
专题	南京土壤研究所
通讯作者	Yu, D. S.
作者单位	1.Nanjing Normal Univ, Coll Geog Sci, Nangnim 210046, North Korea 2.Penn State Univ, Appl Res Lab, University Pk, PA 16802 USA 3.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Yu, D. S.,Yang, H.,Shi, X. Z.,et al. Effects of soil spatial resolution on quantifying CH4 and N2O emissions from rice fields in the Tai Lake region of China by DNDC model[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2011,25:8.
APA	Yu, D. S.,Yang, H.,Shi, X. Z.,Warner, E. D.,Zhang, L. M.,&Zhao, Q. G..(2011).Effects of soil spatial resolution on quantifying CH4 and N2O emissions from rice fields in the Tai Lake region of China by DNDC model.GLOBAL BIOGEOCHEMICAL CYCLES,25,8.
MLA	Yu, D. S.,et al."Effects of soil spatial resolution on quantifying CH4 and N2O emissions from rice fields in the Tai Lake region of China by DNDC model".GLOBAL BIOGEOCHEMICAL CYCLES 25(2011):8.

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